diff --git a/libc/intrin/pthread_mutex_lock.c b/libc/intrin/pthread_mutex_lock.c
index b293a6b7527..cfde8a623e4 100644
--- a/libc/intrin/pthread_mutex_lock.c
+++ b/libc/intrin/pthread_mutex_lock.c
@@ -16,6 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/blockcancel.internal.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/state.internal.h"
 #include "libc/dce.h"
@@ -58,7 +59,9 @@ static void pthread_mutex_lock_drepper(atomic_int *futex, char pshare) {
   if (word == 1)
     word = atomic_exchange_explicit(futex, 2, memory_order_acquire);
   while (word > 0) {
+    BLOCK_CANCELATION;
     _weaken(nsync_futex_wait_)(futex, 2, pshare, 0);
+    ALLOW_CANCELATION;
     word = atomic_exchange_explicit(futex, 2, memory_order_acquire);
   }
 }
diff --git a/third_party/libcxx/__config_site b/third_party/libcxx/__config_site
index 00841946571..6f5fe9be31c 100644
--- a/third_party/libcxx/__config_site
+++ b/third_party/libcxx/__config_site
@@ -26,8 +26,8 @@ __static_yoink("__demangle");
 #define _LIBCPP_DISABLE_DEPRECATION_WARNINGS
 
 #define _LIBCPP_NO_ABI_TAG
-#define _LIBCPP_ABI_VERSION 2
-#define _LIBCPP_ABI_NAMESPACE __2
+#define _LIBCPP_ABI_VERSION 1
+#define _LIBCPP_ABI_NAMESPACE __1
 #define _LIBCPP_USING_GETENTROPY
 #define _LIBCPP_DISABLE_AVAILABILITY
 #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
@@ -40,13 +40,16 @@ __static_yoink("__demangle");
 #define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
 #define _LIBCPP_HAS_CLOCK_GETTIME
 
-#define _LIBCPP_HARDENING_MODE_DEFAULT 2
-
 #ifdef MODE_DBG
 #define _LIBCPP_ENABLE_DEBUG_MODE
 #define _LIBCPP_ENABLE_ASSERTIONS_DEFAULT 1
+#define _LIBCPP_HARDENING_MODE_DEFAULT (1 << 3) // debug
+#elif defined(TINY)
+#define _LIBCPP_ENABLE_ASSERTIONS_DEFAULT 0
+#define _LIBCPP_HARDENING_MODE_DEFAULT (1 << 1) // none
 #else
 #define _LIBCPP_ENABLE_ASSERTIONS_DEFAULT 0
+#define _LIBCPP_HARDENING_MODE_DEFAULT (1 << 2) // fast
 #endif
 
 // PSTL backends
diff --git a/third_party/libcxx/new b/third_party/libcxx/new
index 214dbc39853..c32e7a5a4a2 100644
--- a/third_party/libcxx/new
+++ b/third_party/libcxx/new
@@ -10,6 +10,8 @@
 #ifndef _LIBCPP_NEW
 #define _LIBCPP_NEW
 
+#pragma GCC diagnostic ignored "-Walloc-size-larger-than="
+
 /*
     new synopsis
 
@@ -264,6 +266,7 @@ _LIBCPP_HIDE_FROM_ABI void* __libcpp_operator_new(_Args... __args) {
 #if __has_builtin(__builtin_operator_new) && __has_builtin(__builtin_operator_delete)
   return __builtin_operator_new(__args...);
 #else
+
   return ::operator new(__args...);
 #endif
 }